Ribbon holder and vibrator.



A, C. ROEBUCK. RIBBON HOLDER AND VTBRATOR.

APPLICATION mm MAR. 13, 1915.

Patented Aug. 13, 1918.

xfiZi U/L (i. Roebuck.

l it the parts.

brator tions.

\ UNITED STATESPATENT O it ALVAI-I o. ROEBUGK, orranx RIDGE, rnnnvois, rissrenon ro woon srooK rvrnwnrrnn COMPANY, or woonsrocK, ILLINOIS, in oonroaarxolv 1,275,755, na l To all whom it may concern." i l Be it known that I, ALVAH O. Ronnuoic, a citizen of the United States, residing. at Park Ridge," in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Ribbon Holders,

and Vibrators, of specification. a a r his invention: relates to typewriter construction, but more particularly to that :portion-of typewriter mechanism by means of which the printingribbon is heldand reciprocated at each movement ef the type bars. The invention consists in anovel construction,'co1nbinat1on and arrangement of which the following: a is a The principal objects of the present in vention are to produce a constructionin which the parts need not be fitted so closely as in some other constructions; to elfeot a saving in time in the assembling ofthe parts by; obviating close adjustments; and toprovide a construction in which thereis a minimum wearing of the parts, to prevent them from getting out of alinement. a In the accompanying drawings a a Figure l is a plan view of a ribbon holder and vibrator constructed in accordance with the principles ofmy invention;

ig. 2 is a sideelevation partly in section of the parts shown in Fig. 1;

Fig, 2- shows the upper Fig. 3 is a detail view of operating mechanism, and a r a i 1 F i 4 is a perspective of a spring clip attachment. v

In a type of construction of the class to which this invention relates, andin which the vibrator lever was provided with an inclined slot with which the ribbon vibrator had engagement, it was possible under certain conditions to .disengagethe ribbon vibrator from the lever, especially when the vibrator and, lever were in their uppermost positions, by takinghold of theribbon vibrator andpullingit upwardly, the springing the vibrator of the lower part belngsuflicient to allow it become released from the lever. y having the pin on the vibrator inei igagement with a sloton the lever, the slot is at an angle to a horizontal line when: the vibrator is in its uppermost and lowermost posi- This has a tendency to cause the joint pin in the bottom of the vibrator toslide up assessme t Annvmanronf on of Letters Patent.

drawings,

bracket 12 is a or rttnvors.

a Paar-e e-- ,1918.

"Applieationiiled March 13,1916. seri INasana r or downyasthe casemay beymalting it impossible to hold the ribbonlin perfect alineinent; also {if there were very much wear between these connecting parts, it would be Idifficult at all times, even with the closest adjustmentobtainable, to hold the ribbon proper alinement. i r a i l n order to overcome these difliculties, the conditions have been reversed; thatisfthe ribbonvibrator itself has been provided with a slotted member at the bottom thereof in whiclh the slot is alwaysheld in a horizontal position, and engaging this ried by the vibrator lever, which, it is true, makes a sliding connection withthe slot of theholder, but since the slot is always held 1111a horizontal position, the closest possible adjustment is always obtainable; there is no danger that the vibrator will slip or get out ofalinement with respect to an inclined surface, and there is no possibility that the parts-will become disengaged at either end or at any part of their movement. a eferring now more particularly to the the reference numeral 4 desigtremities 5, gaging slot 6. At its lower end the holder is slightly bent,and formedintegral therewithor rigidly attached thereto is a slotted member 7 so disposed that the slot 8 thereof extends in a horizontal direction. A brace orstre'ngthening ridge 9 is formed at the bendof the vibrator to keep it in the positionto which it is bent. It is understood, of course, that intermediate the ends of the vibrator 4 it is provided with a suitable guide for limiting the movement to an up down reciproeating motion, the upper end ofithe vibrator being movable adjacent the front of a typewriter platen which is not shown in the drawings, as it is notnecessary to-the proper understanding ofthe present invention. A carriage shifting frame for the typewriter, comprising bars frame, and :pivoted in the trio pm 14: at one end and agear 15 attached.

to the shaft. Mounted on the stud shaft is a lever 16, and pivoted on one arm of the lever 16 is ribbon vibrator lever 17, one end 18 of which has a pin 19 engageable in the slot is a pin car stud shaft 13 with an eccenprinting position, and th throw of the vibrator rately setting or is'provided witha slot 20, which is engaged gear 15 attached to the stud shaft 13 is a gear 21, which may be rotated from the side of the typewriter shift frame and from the side of the typewriter itself, to vary the position of the eccentric pin-14L to vary the position of the lever 17 and the ribbon vibrator 4, thus furnishing an adjustment for varying the position of the ribbon vibrator to utilize the full width of a ribbon carried thereby.

A spring clasp 7' 8" which extend over the outer sides of slots 8 may be riveted to the lower end. of the holder 1, as shown in Fig. 4, for convenience inassembling the parts and holding the pin 13 in position, if it is loosely connected to arm 18.

The ribbon v1 rator lever 17 is oscillated by means of a universal bar 22 and a frame 23 to which it is attached, the universal bar being engaged in the ordinary way by the movement of the printing type bars to the e movement of the universal bar being given directly to the frame 23. Upturnedfrom the frame 23 is a bracket 24 in which a member 25 is pivoted. This member is formed-with lateral projections 26, and the frame 23 is formed with corresponding bosses 27 in which screws 28-are threaded to engage the lateral extending portions 26'to adjust the position of the pivoted member 25 with respect to the frame. 7 Connecting the member 25 and the upper end of the oscillating lever 16,,is a link 29; The adjusting screws 28 and the pivotedi member 25 are varying the position of the 'oscillatinglever 16 during assembly'or subsequent adjustment of the machine, the vibrator "lever 16 being moved horizontally by this adjustment, and the movement of the oscillating lever 16 on the stud shaft 13 and with respect to the eccentric pin 14: causing an adjustment or variation of the vibrator lever 17 and a corresponding variation 111 position of the vibrator 4, so that the vibrator can be made to assume a predetermined initial position, and a proper variation of can be obtained by the subsequent rotation of the stud shaft and its eccentric pin from the side of the typewriter as above set forth.

The slotted member 7 at the lower end of V the ribbon vibrator 4 is preferably in two spaced slotted portions, between which the extremity 18 of the lever 17 is inserted, inserted through a proper aperture in the said end 18 and having a proper engagement with the slots 8 on both sides of the end 18. This produces a considerable bearing surface, which struction of the parts by the eccentric P1I1'14:. Meshing with the and thereby with depending sides provided for accu-' is therefore less susceptible to wear than other constructions, and because of the conthe wearing is evenly divided and the connected "parts are held in proper alinement and engagement with each other, without tendency to bend or buckle in either direction. The slots 8 of this member 7 are always in the horizontal position, and even if there is some wear between the pin 19 and the slots 8, there will be no difliculty in adjusting or placing the ribbon and its holder 41 in any desired position; for by simply varying the position of the lever 17, the ribbon vibrator 1 can be raised or lowered by a direct vertical engagement of the connecting parts, namely, a pin 19 and the horizontal slots 8. Therefore, no close adjustment of these parts' is necessary in assembling the typewriter and these parts, for their position can be varied with absolute certainty by the simple adjustment of the ribbon vibrator lever 17.

It is obvious, from the above description of the parts, that the actuation of the universal bar and its frame will cause the reciprocation of the ribbon vibrator; the oscillating lever 16 being attached to the shift frame which, although movable into upper or lower case position, is in either position fixed with respect to the frame 23, which is oscillated as set forth by the printing type bars. The oscillation, therefore, of the member 25, which is connected by means of the link 29 to the lever 16, will cause the oscillation of the lower end of this lever 16 to which the vibrator lever 17' is pivoted.

I claim:

1. In an adjustable ribbon vibrator, the combination with a vertically rcciprocablc vibrator having a horizontal slot at the lower end, and a horizontally adjustable vibrator lever having a pin on one arm engaging in the slot.

2. The combination with a vertically rcciprocable and adjustable ribbon vibrator having lower forked extremities with registering horizontal slots therein, a horizontally adjustable lever with one end extending between the extremities, and a pin fitting tightly in the lever and extending from both sides thereof into the slots.

3. The combination of a vertically reciprocable ribbon vibrator formed of sheet material and having a lower extremity bent to extend horizontally with a strengthening ridge formed up out of the material at the bend and with the end bent to form a and means to engage the for moving and adjusting said bar and having a projecting pin which engages in the horizontal slotfor accurately horizontally and vertically adjustable and vertically oscillatable lever extending between the extremities jecting from both sides thereof into the slots, the horizontal slot accurately defining the vertical position of the vibrator.

6 The combination with a ribbon vibrator havlng a forked end with registering slots in the extremities, a lever having an arm extending between the extremities, a pin extending through the arm into the slots at both sides of the arm, and means extending over the outersides of the slots to prevent disengagement of the pin.

7. The combinatlon with a ribbonvibrator having a forked end with registering slots in the extremities, a lever having an arm extending between the extremities, a pin extending through the arm into the slots atboth sides of the arm, and a spring clip attached to the vibrator having portions to extend over the outer sides of the slots to hold the pin in place. j

8. The combination with a ribbon vibrator formed of sheet material with a forked end bent at right angles to the remainder of the vibrator and the bend strengthened.

by a ridge and with the extremities of the fork bent over upon themselves to form slots, of an oscillatable lever fitting closely between said extremities, and a pin extending through the lever and into the slots at each side thereof.

9. The combination with a vertically reciprocable ribbon vibrator having a horizontal slot at its lower end, a vibrator lever pivoted intermediate its ends and having a projecting pin at one end which engages in the horizontal slot for accurately position-i ing the vibrator, and an adjustable connection at the other end of the lever for varying.

its position.

Copies of this patent may be obtained for five cent: each, by addreas lng the i Walhlngton, 11.0."

and having a pin prosupport for 10. The combination with a vertically reciprocable ribbon vibrator having a horizontal slot at its lower end, a vibrator lever pivoted intermediate its ends and having a projecting pin at one end which engages inthe horizontal able universal bar, a variable pivotal support for said lever with an adjustment in vibrator having a horizontal slot at its lower end, of a vibrator lever having a the slot, mediate its ends, means for engaging the other end of the leverto raise or lower the vibrator, and an adjustment forthe pivotal moving it in the direction of said slot. a a.

12. The combination with a vertically reciprocable ribbon vibrator having a horizontal slot, of a vibrator lever having a pin engaging in the slot, a, universal bar frame, means for supporting the lever intermediate its ends comprising a justable connection between the second lever and the frame for moving the vibrator lever substantially parallel with the said slot, and an independently adjustable engagement for the other end of the vibrator lever for varyingthe vertical position of the vibrator.

13. The combination with a vertically reciprocable ribbon vibrator having a horizontal slot at its lower end, brator lever having apin connection with said slot, meansfor ad usting the horizontal position of the lever and pin in the slot,

In testimony whereof Ihave signed my name to this specification, in thepresenoe of two subscribing witnesses,on this tenth day J. F. SWAHTSTEDT, L. E. IIOUSHOLDER- of March, A.

"Commissioner of ratents,

slot for accurately positiomngthe vibrator, a horizontally reciprosecond lever, an adof a ribbon vii 11. The combination with a vertically re- .ciprocable ribbon j and separate means for adjusting the verti cal position of the lever and said vibrator. 

